What is the reason for the decrease in horsepower of Wuling National VI vehicles?
4 Answers
The reason for the decrease in horsepower of Wuling National VI vehicles is that the higher the emission standard, the stronger the lag in power response. There are three upgrade scenarios from National V to National VI: The engine hardware remains unchanged, the exhaust emission system is improved, and the software is adjusted to meet National VI emission standards. The engine hardware and software are not changed, as they already meet National VI emission standards, but due to technical reasons, they could only be certified for National V emissions. Both the engine software and hardware are readjusted to comply with National VI emission standards. Exhaust emission technology: The commonly adopted methods include exhaust gas recirculation, three-way catalytic converters, and other exhaust treatment technologies. Although the exhaust gas recirculation system helps reduce nitrogen oxide emissions, the oxygen concentration and combustion temperature decrease during the intake process, slowing down the combustion speed, which leads to a reduction in power and a corresponding increase in particulate emissions such as PM.
I just switched to a Wuling National VI model, and it feels noticeably less powerful than the old version, especially when climbing hills. Experts say it’s mainly because, to meet the National VI emission standards, manufacturers adjusted the engine—like adding a particulate filter. This device cleans the exhaust but increases resistance, reducing power output. Some models also limit power output via software to cut nitrogen oxide emissions, though fuel consumption hasn’t changed much. Even though the horsepower is lower, I see it as a trade-off for better environmental protection—air quality has improved a lot. It’s still sufficient for daily driving, but regular checks on the exhaust system and maintenance are crucial to prevent carbon buildup from causing more issues. [166 words]
Having repaired many Wuling vehicles, it's quite common to see a decrease in horsepower for the China 6 emission standard versions. The root cause lies in emission upgrades, where automakers must optimize engines to reduce pollutants, resulting in reduced horsepower. For example, the addition of backpressure control devices like GPFs affects exhaust flow; ECU programming adjustments limit explosive power to ensure emissions compliance; and improvements in the cooling system may also indirectly reduce power. Although it doesn't feel as powerful as before, it's beneficial for the environment and simpler to maintain in the long run. Owners are advised not to worry—just drive normally and have sensors and filters checked promptly if any issues arise.
As an environmentally conscious individual, I find the reduced horsepower in Wuling's China VI emission standard models to be a positive development. This strictly complies with national environmental regulations by decreasing power output to minimize harmful emissions. The manufacturer adjusted engine parameters and installed additional control devices, sacrificing some performance for cleaner air—a reflection of societal progress. Driving slower also enhances safety. In daily use, the difference is hardly noticeable, and the vehicles remain perfectly adequate for urban commuting. [128 words]
